There is a macro in the archive for this: https://www.gnu.org/software/autoconf-archive/ax_check_define.html On Sun, Mar 14, 2021 at 11:57 PM Dan Mahoney <danm@xxxxxxxxxxxxxxx> wrote: > > All, > > One of OpenDMARC’s users has commented that on the musl c library, the defines NETDB_SUCCESS and NETDB_INTERNAL are absent. > > While we could add: > > +#ifndef NETDB_INTERNAL > +#define NETDB_INTERNAL (-1) > +#endif > > To our own code, this feels like something autoconf should be able to test for and do for us. > > But I can’t seem to figure out how, without running AC_COMPILE_IFELSE. If that’s the answer, I’m willing to try it (or, as above, just add the ifdefine to our code), I just want to make sure I’m not missing something obvious. > > I’ve had to do some autoconf-bashing since we got a bug report to support 2.70, so it’s making me want to understand the WHOLE THING. Which is turning out to be a journey. > > -Dan -- VH
